The Full Form of WHF is Warhammer Fantasy.

Warhammer Fantasy is a fictional fantasy universe created by Games Workshop and used in many of its games, including the table top wargame Warhammer Fantasy Battle, the Warhammer Fantasy Roleplay (WFRP) pen-and-paper role-playing game, and a number of video games: the MMORPG Warhammer Online: Age of Reckoning, the two Total War: Warhammer strategy games Total War: Warhammer and Total War: Warhammer 2 and the two first-person shooter games in the Warhammer Vermintide series, Warhammer: End Times – Vermintide and Warhammer: Vermintide 2.

Warhammer is notable for its “dark and gritty” background world, which reference a range of historical cultures, along with other fantasy settings, in particular Tolkien’s Middle-earth. From Michael Moorcock, its creators took the theme of “Chaos” as a force unceasingly attempting to tear the mortal world asunder. The world itself was populated with a variety of races such as humans, high elves, dark elves, wood elves, dwarfs, undead, orcs, lizardmen, and other creatures familiar to many fantasy/role-playing settings.

The development of the setting began with the release of a game simply called ‘Warhammer’ in 1983.